A cobpobasjioet osi



May 13, 1924.

W. W. ROBERTSON WEFT REPLENISHING MECHANISM FOR TERRY LOOMS Filed April 5. 1922 VIILLIA'M 'W. RGBEETSON, 031 W 03i ll-[AS SACEUSETT$ VJEFT-BEELENISZ-IING FOR TERRY LOOKS.

Application filed April 5,

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l, l i iiizaiui l i Ronni-1T- e King of Great Britain, iiw'u'ccster. in the county of husetts. have i; oft-Replenishing ltfechanism for Torn; Looms, of which the following; is a specification; This invention relates to the application of weft replenishing mechanism to socalled Terry loom in which 'lnrltish towelliug or other uncut pile l. fabrics are woven. More particularly it relates to that type of Terry loom in w ich the lay and reed as a unit have two distinct ranges of movement. in contrast to Terry looms of the movable reed type. I I

It is the object of my invention to provide weft replenishing mechanism so positioned that it will cooperate with the lay when the latter is oscillated. in one range of ITIOVQIDQDl; only, preferably the rearward range.

A further object of my invention is to provide shuttle driving mechanism so arranged and timed that the shuttle v' l be housed on the magazine end of the la only when the lay is moving; in its operative range as considered with reference to the weft replenishing; mechanism. M invention. therefore pertains partirnilarlv to Terry looms in. which the fu l cycle of changes in the ranges of movement occupy an even. number of picks or heats of the lay. so that the shuttle will always occupy the same shuttle-box at the same point in the cycle of operations of the loom.

My invention further relates to arrange ments and combinations of parts which will be hereinafter described and more particularly pointed out in the app-ended claims. A. preferred form of my invention is, shown in the drawings in which Fig. 1 is a side elevation of a Terry loom embodying; my improvements and Fig. 2 is a detail side elevation showing the parts in a different relative position.

Referring to the drawings, 1 have indicated a loom frame 10, and a lay 11 mounted to oscillate on swords 12 about a reel: shaft (not shown) near the bottom of the frame 10. The lay is actuated through connecting rods 13 from a crank shaft 14 mounted to i the shaft i522. Serial No. 54.9.741

in movable bearings The hearings 15 are of cylindrical form may he moved ilarly in join 1 lJOf=IS 1%. or this purpose 1? on the. bearings 15 are connected h 1l-IS 18 to 2* ms 19 on a. cross shalt 20. The shaft 20 is supported in hearings 21 in the lows rear part of the frame 10 and is provided with operating arm 22 connected by a link 98 to a lever pivoted at 25 on the loom frame 10.

A spring 26 moves the lever 24: yieldingly upward, sh fting the beaiing boxes 15 to their rearward position. as shown in Fig. 2, and the lever 2 is moved positively in the opposite or downward direction when engaged by a roll 2'? on an arm 28 fixed which drives the picl:

cams 30.

The shaft is gear-driven from shaft 31 and, as shown in the drawing, is arranged to'malre one revolution for every two revolutions of the shaft 31. The shaft 31 is the usual cam or bottom shaft. driven by 2-130-1 gear connections not shown) from the usual crank shaft 1 1. The shaft 29 thus makes one revolution to each four revolutions of the crank shaft 1 1 and to each four l. is of the lay. This exact ratio is not essential to my invention. but it is necessary that the crank shaft boxes 15 be shifted in. the same direction only at in tervals of an even number of picks.

The usual picker sticks 32 are actuated through pick shafts by the pick cams which cooperate with cam rolls 3% mounted on the pick shafts.

The parts thus described are or may be of the usual construction and in themselves form no part of my present invention.

The weft replenishing mechanism shown in the drawings comprises amagazine 40 of the stationary type supported in fixed position on the loom frame and having the usual operating mechanism for a magazine of this type, including a transferrer 4-1 by which a fresh weft carrier is advanced to the shuttle to replace a substantially eX- hausted weft carrier therein.

Weft detecting; mechanism :2, also of a usual type is indicated in the drawings and both the weft replenishing mechanism.

and the detecting mechanism are positioned.

to cooperate with the lay when the latter is moving in one only of its ranges of movement, preferably the rearward range.

As the weft detecting and replenishing mechanism is not in. operative relation with the lay when the latter is positioned in its forward range of movement, I have so con structed and related the several parts of the loom that the picking mechanism will ways house the shuttle S at the end of the lay remote from the magazine as the lay is advancing in its forward range of movement.

A single shuttle lJOX is provided at the magazine sine of the loom, the invention not being applicable to a picltand pick loom. Drop boxes of the usual type may be used at the opposite side of the loom.

The loom being started with the shuttle at the drop box side on the forward range of the lay and this range being operative only after an even number of picks, it follows that the shuttle is presented at the magazine end of the lay only when the lay is travelling in its rearward range of movement and when the lay is consequently in operative relation with the magazine and weft detecting mechanism.

While herein shown in connection with mechanism for weaving a four pick Terry fabric, my invention is equally applicable to any Terry weave involving a cycle of an even number of picks.

It should be further understood that the magazine and detecting mechanism shown in the drawings are illustrative only, as the utility of my invention is not limited to a particular form or type of magazine or detector.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the specific details herein disclosed otherwise than as set forth in the claims, but what I claim is 1. In a loom, a lay having forward and rearward ranges of movement, means to oscillate said lay, means to shift the range of movement thereof forward or rearward at predetermined intervals, a shuttle on said lay, weft replenishing mechanism positioned to cooperate with said shuttle in one range of movement only of said lay, and shuttle driving mechanism timed to house the shuttle on the magazine end of the lay only when said lay is shifted to operative relation with said weft replenishing mechanism.

2. In a loom, a lay having forward and rearward ranges of movement, means to oscillate said lay, means to shift the range of movement thereof forward or rearward in a cycle comprising an even number of beats of the lay, a shuttle on said lay a weft replenishing mechanism positioned tocooperate with said shuttle when the lay is moving in one range of movement only thereof, and shuttle driving mechanism timed to house the shuttle on the end of the lay remote from the magazine whenever the lay beats up in inoperative relation with said weft replenishing mechanism. i

3. In a loom, a lay having two ranges of movement. means to oscillate said lay,

means to periodically change the range of movement thereof, a weft replenishing mechanism positioned to cooperate with said lay in its rearward range only, a shuttie, and shuttle driving mechanism effective to present the shuttle to the magazine end of the lay only when said lay is traveling'in its rearward range of movement.

4. In a loom, a lay having a forward and rearward range of movement, means to oscillate said lay, means to periodically change the range of movement of said lay from one range to the other, a weft repleir ishing mechanism positioned to cooperate with said lay in its rearward range of movement only, and means to shift said lay to its forward range of movement at intervals of even numbers of beats of the lay.

In testimony whereof I have hereunto aflixed my signature.

WILLIAM 'W. ROBERTSON. 

